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frutty [35]
3 years ago
5

I need know what is x .

Mathematics
2 answers:
lys-0071 [83]3 years ago
7 0

Answer:

21 x +6 =90⁰( Alternate exterior angles)

=) 21x =84

=) x =84/21 = 4

irina [24]3 years ago
3 0

Answer:

x is 4

Step-by-step explanation:

21x+6 = 90

21x=84

x=4

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Can somebody help me with this?
icang [17]

We are given polynomial: 5x^3+8x^2-7x-6.

We need to explain why the binomial (x + 2) IS a factor of this polynomial expression and  why the binomial (x + 1) IS NOT a factor of this polynomial expression.

Let us set first factor equal to 0 and solve for x.

x+2=0

x=-2.

Plugging x=-2 in given polynomial, we get

5(-2)^3+8(-2)^2-7(-2)-6 = 5(-8) +8(4)+14-6

= -40 +32+14-6

=0

<em>Because x=-2 gives 0 on plugging in given polynomial, so it's factor of given polynomial expression.</em>

Now, let us check second factor x+1=0

x=-1.

Plugging x=-1 in given polynomial, we get

5(-1)^3+8(-1)^2-7(-1)-6 = 5(-1) +8(1)+7-6

=-5+8+7-6.

= -4.

<em>Because x=-1 doesn't gives 0 on plugging in given polynomial, so it's not a factor of given polynomial expression.</em>

7 0
3 years ago
Sam decided that he is going to start biking to work as much as possible. After 4 days of work Sam has
mr_godi [17]

Answer:

<u>Proportion:</u>

<u>4/15 = 20/75</u>

<u>Sam will bike 37.5 km after 10 days.</u>

Step-by-step explanation:

1. Let's review the information given to answer the question correctly.

Number of days Sam has gone to work biking = 4

Amount of kilometers Sam has logged on his bike = 15

2. a. Set up a proportion to solve the amount of km he will log after 10 days on the bike.

Number of days Sam has gone to work biking = 4

Amount of kilometers Sam has logged on his bike = 15

2. a. Set up a proportion to solve the amount of km he will log after 10 days on the bike.

4/15 = 20/75

b. Solve for the amount of km in part (a).

Let's use the proportion, this way:

20/75 = 10/x

20x = 75 * 10

20x = 750

x = 750/20

x = 37.5

<u>Sam will bike 37.5 km after 10 days.</u>

4 0
3 years ago
Sophie bought 23 cans of cat food for x dollars. Write an expression to show the cost of one can of cat food.
romanna [79]
The correct answer is: X Divided by 23
8 0
3 years ago
Read 2 more answers
Malcom is filling bags with rice. He starts with 5 1/4 lbs. container of rice and fills each bag with 5/8 pound of rice. How man
NeTakaya
He can fill five bags with 2/8 lbs of rice left that is left over a d can not go into a bag .
8 0
3 years ago
an element with mass 630 grams decays by 18.8% per minute. How much of the element is remaining after 7 minutes, to the nearest
Mashutka [201]

Answer:

Step-by-step explanation:

Total Depreciation: 60.24%

Total depreciation: $9,759.50

Car Value after 6 years: $6,440.50

6 0
3 years ago
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